Centipedes generally remain under stones, bark, and ground litter by day. At night they hunt for and capture other small invertebrates. They move rapidly on from 14 to 177 pairs oflegs and have one pair of long, many-jointed antennae and a pair of jawlike, venomous claws just behind the head. The 25-mm ( 1-inch)-long …
azide, any of a class of chemical compounds containing three nitrogen atoms as a group, represented as (-N3). Azides are considered as derived from hydrazoic acid (HN3), an inorganic salt such as sodium azide (NaN3), or an organic derivative in which the hydrogen atom of hydrazoic acid is replaced by a hy…
a cappella (Italian: "in the church style"), performance ofa polyphonic (multipart) musical work by unaccompanied voices. Originally referring to sacred choral music, the term now refers to secular music as well.The a cappella style arose about the time of the composer Josquin des Prez, in the late 15th century, and reached preemine…
Infrared and nonresonant Raman spectroscopies are based on the excitation of specific vibrational modes of the system under study. The frequency, intensity and width of the measured signals are highly sensitive to the local structure, composition and microstructure of the investigated samples, leading to a wide range of applications in mineralogy …
A direct means of indicating the presence of concealed mineralization would be the ultimate in exploration. In many ways the.induced-polarization (IP) technique comes close to achieving this goal. it has been remarkably successful in locating concealed bodies containing even small percentages of metallic-luster minerals.
I…
When I put pen to paper in the summer of 1982, uppermost in my mind was the need to provide new practitioners with an introduction to the theory and practice of thermoluminescence (TL) dating, particularly those without a strong background in physics. Assimilating the corpus of specialist papers which at present define the theory and practi…
This practical step by step guide describes the key geological field techniques needed by today's exploration geologists involved in the search for metallic mineral deposits. The techniques described are fundamentals to the collection, storage and presentation of geological data and their use to locate ore. This book explains the various tasks which…
There are few places in the developed world particularly where the coal industry does not feel that it faces major challenges. Climate change, safety and a variety of other environmental.issues are just some of the concerns. In many cases these concerns are justified, and certainly in the developing world much more needs to be d…